Autor: Lan, Phuong Dinh Thi - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Optimization of Copper Removal by Photovoltaic Electrocoagulation from Aqueous Solution Using Response Surface Methodology Towards Sustainable Development
Autorzy:: Thanh, Hoa Nguyen
Nguyen, Lien
Lan, Phuong Dinh Thi
Powiązania:: https://bibliotekanauki.pl/articles/123109.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: photovoltaics
electrocoagulation
copper
Box-Behnken design
energy consumption
lithium battery
sustainable development
Opis:: This research aims at illustrating the optimal functions of removing copper ions in aqueous solution by means of the electrocoagulation process in which portable solar power generators are used as renewable energy. A solar photovoltaic cell (PV), producing approximately 48A current intensity for 4-7 h per day, was sufficient to charge the lithium batteries completely during the day. This system was connected directly to the electrocoagulation tank. The Box-Behnken design (BBD) was applied to evaluate three effects of process factors: current density, the dose of electrolyte (NaCl), and application time. The results showed that an optimal efficiency of 99.01% Cu removal plus an energy savings of 1.039 kWh/m³ were obtained at a current density of 4 A/m², the dosage of NaCl (electrolyte) of 1.87 g/L, and electrolysis time of 10 min. The chemical components of the sludge produced under these optimized conditions were determined by means of EDX. It was illustrated that the copper ions were the main elements of sludge, and nonhazardous compounds were contained. The PV-lithium battery system is considered to be an efficient alternative energy source toward sustainable development.
Źródło:: Journal of Ecological Engineering; 2019, 20, 7; 103-111
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Cadmium Immobilization in the Rice – Paddy Soil with Biochar Additive
Autorzy:: Thi, Khac Vu
Lan, Phuong Dinh Thi
Hang, Nga Nguyen Thi
Thanh, Hoa Nguyen
Powiązania:: https://bibliotekanauki.pl/articles/2086382.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Cd
cadmium
soil contamination
rice grain
cadmium accumulation
biochar
straw
Opis:: Cadmium (Cd) is toxic for humans, but its effects on the yield and quality of rice under contaminated irrigation conditions remain uncertain. In this study, paddy soils in the Red River Delta (Vietnam) were selected for experiments with the purpose of understanding the effects of Cd contaminated irrigation water on growth, yields, and grain Cd accumulation. In addition, biochar was produced from rice husk (BRH) and rice straw for preventing Cd infiltration into rice was also studied in this experiment. A field experiment was established with applicated BRH and straw into polluted paddy soil, as a result the Cd content in grains reduced significantly. The Cd contaminated soil was added to the BRH and rice straw (RS) with six ratios, including: (1) RS 2.5%, (2) BRH 2.5%, (3) RS-BRH: 1.25–1.25%, (4) RS 5.0%, (5) BRH 5.0%, (6) RS-BRH: 2.5–2.5%, (w:w). Besides, three content levels 0.01–0.05–0.5 mg/L of Cd in irrigation water were applied throughout crop season. The results showed that the Cd accumulation in rice was in the following order: roots > stems > seeds. With 3 contaminated irrigation levels which were applied, the Cd concentrations of 0.05 mg/L and 0.5 mg/L affected plant height and yield. However, the Cd content in grains under contaminated soil condition can be controlled from 82.47–83.94% by applying a BRH ratio from 2.5–5% (w:w).
Źródło:: Journal of Ecological Engineering; 2022, 23, 4; 85--95
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Sandy Soil Reclamation Using Biochar and Clay-Rich Soil
Autorzy:: Thi, Diep Pham
Hang, Nga Nguyen Thi
Viet, On Tran
Van, Loc Nguyen
Viet, Anh Nguyen
Lan, Phuong Dinh Thi
Van, Nguyen Vu
Powiązania:: https://bibliotekanauki.pl/articles/1838287.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: sandy soil
biochar
clay-rich soil
physical properties
chemical properties
Opis:: The investigations on the effects of biochar application in improving the physio-chemical properties of soil have been carried out in many studies; however, there are very few studies on the combined use of both biochar and clay-rich soil for poor nutrient soil reclamation. Therefore, this study demonstrates improved water retention and nutrient retention of sandy soil by using biochar and biochar combined with clay-rich soil. The experiments were conducted on a small scale (greenhouse) with nine different application rates of biochar and clay-rich soil were mixed and then cultivated peanut, along with the drip irrigation technique using field moisture limit (about 70-80%) was applied under the condition of ensuring a sufficient supply of NPK for plant’s growth. The results showed that at the rates from 10.0-15.0% (w/w) clay-rich soil mixed with from 0.5-1.5% (w/w) of biochar applied to the tested sandy soil resulted in the positive effects on soil water holding, bulk density, permeability, pH, CEC, OM, total N, total P and peanut yield. The physical and chemical characteristics of the tested sandy soil have been improved by time and the application rate of 10.0% clay-rich soil and 0.5% biochar had the highest efficiency of pod fresh weight and pod dry weight during three studied seasons.
Źródło:: Journal of Ecological Engineering; 2021, 22, 6; 26-35
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Sandy Soil Reclamation Using Biochar and Clay-Rich Soil
Autorzy:: Thi, Diep Pham
Hang, Nga Nguyen Thi
Viet, On Tran
Van, Loc Nguyen
Viet, Anh Nguyen
Lan, Phuong Dinh Thi
Van, Nguyen Vu
Powiązania:: https://bibliotekanauki.pl/articles/1838394.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: sandy soil
biochar
clay-rich soil
physical properties
chemical properties
Opis:: The investigations on the effects of biochar application in improving the physio-chemical properties of soil have been carried out in many studies; however, there are very few studies on the combined use of both biochar and clay-rich soil for poor nutrient soil reclamation. Therefore, this study demonstrates improved water retention and nutrient retention of sandy soil by using biochar and biochar combined with clay-rich soil. The experiments were conducted on a small scale (greenhouse) with nine different application rates of biochar and clay-rich soil were mixed and then cultivated peanut, along with the drip irrigation technique using field moisture limit (about 70-80%) was applied under the condition of ensuring a sufficient supply of NPK for plant’s growth. The results showed that at the rates from 10.0-15.0% (w/w) clay-rich soil mixed with from 0.5-1.5% (w/w) of biochar applied to the tested sandy soil resulted in the positive effects on soil water holding, bulk density, permeability, pH, CEC, OM, total N, total P and peanut yield. The physical and chemical characteristics of the tested sandy soil have been improved by time and the application rate of 10.0% clay-rich soil and 0.5% biochar had the highest efficiency of pod fresh weight and pod dry weight during three studied seasons.
Źródło:: Journal of Ecological Engineering; 2021, 22, 6; 26-35
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Rice Growth, Grain Zinc, and Soil Properties under Saline Irrigation Conditions
Autorzy:: Thi, Lan Phuong Dinh
Hang, Nga Nguyen Thi
Nguyen, Hoa Thanh
Nguyen, Lien Thi
Powiązania:: https://bibliotekanauki.pl/articles/1955578.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: salt stress
rice growth
nutrient zinc
irrigation water
salt accumulation
Opis:: This research evaluated rice growth and yield as well as Zn accumulation in both soil and grain under saline water irrigation conditions. The experiment consisted of a series of pots containing rice plants and paddy soil, with the application of irrigation treatments of five different salinity levels (1.5, 2, 3, 4, and 5‰ with a drip irrigation system). The results show that the salinity accumulation levels in soil can increase by up to 2.8‰ following the application of 5‰ salinity irrigation water during the development stages. Besides, this study also aimed to evaluate the influences of saline water irrigation on the observed rice yields, plant height, leaf length, and leaf width. In the results, irrigation with 3‰ saline water reduced potential rice yield by 58.6% and the length of rice leaves by one-third. Higher salinity of 4‰ in the irrigation water produced only 24% of average potential productivity, and 5‰ water salinity resulted in no yield. Furthermore, salt stress limited the mobile Zn content in paddy soil, reducing the Zn accumulation in grains by between 36.27% and 83.21%. Thus, the study shows that controlling salinity in irrigation water management is essential for controlling the yield and nutrient Zn content in rice grains.
Źródło:: Journal of Ecological Engineering; 2021, 22, 9; 59-70
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: The influence of earning management and surplus free cash flow on the banking sector performance
Wpływ zarządzania zyskami i swobodnego przepływu nadwyżki na wyniki sektora bankowego
Autorzy:: Thai, Van Ha
Dinh, Van Tien
Nguyen, Van Song
Nguyen, Minh Hien
Nguyen, Cong Tiep
Pham, Thi Lan Phuong
Powiązania:: https://bibliotekanauki.pl/articles/2021135.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Częstochowska
Tematy:: earnings management
banking sector
fixed effect model
financial performance
zarządzanie wynikami
sektor bankowy
model o efekcie stałym
wyniki finansowe
Opis:: The banking sector is considered as the backbone of the economy and needs to examine its performance frequently and get the attention of recent studies and regulators. Therefore, the purpose of the present research is to examine the impact of earnings management and surplus free cash flow on the state-owned banks of Vietnam. This study has used secondary data collection methods and used the financial statements of the twenty-five commercial banks in Vietnam. This study extracted the data from 2009 to 2020 banks’ financial statement. This study has executed the fixed effect model (FEM) and robust standard error to analyze the nexus among the variables. The results have revealed that earnings management and surplus free cash flow have a positive association with the banking sector of Vietnam. This research provides the guidelines to the regulators while formulating policies related to the banking sector performance and earning management.
Sektor bankowy jest uważany za kręgosłup gospodarki i musi często analizować swoje wyniki oraz zwracać uwagę na ostatnie badania oraz organy regulacyjne. Dlatego celem niniejszego badania jest zbadanie wpływu manipulacji dochodami i swobodnego przepływu nadwyżki środków pieniężnych na państwowe banki w Wietnamie. W badaniu wykorzystano wtórne metody zbierania danych i wykorzystano sprawozdania finansowe dwudziestu pięciu banków komercyjnych w Wietnamie.W badaniu tym wyodrębniono dane ze sprawozdań finansowych banków z lat 2009-2020. W badaniu tym wykorzystano model efektów stałych (MES) i solidny błąd standardowy w celu przeanalizowania powiązania między zmiennymi. Wyniki wykazały, że zarządzanie dochodami i nadwyżki wolnych przepływów pieniężnych mają pozytywny związek z sektorem bankowym Wietnamu. Badanie to dostarcza wytycznych dla regulatorów przy formułowaniu polityk związanych z wynikami sektora bankowego i zarządzaniem dochodami.
Źródło:: Polish Journal of Management Studies; 2021, 23, 1; 403-417
2081-7452
Pojawia się w:: Polish Journal of Management Studies
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "Lan, Phuong Dinh Thi" wg kryterium: Autor

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język